/*
**  Galapix - an image viewer for large image collections
**  Copyright (C) 2008 Ingo Ruhnke <grumbel@gmx.de>
**
**  This program is free software: you can redistribute it and/or modify
**  it under the terms of the GNU General Public License as published by
**  the Free Software Foundation, either version 3 of the License, or
**  (at your option) any later version.
**
**  This program is distributed in the hope that it will be useful,
**  but WITHOUT ANY WARRANTY; without even the implied warranty of
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**  GNU General Public License for more details.
**
**  You should have received a copy of the GNU General Public License
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "tools/rotate_tool.hpp"

#include <iostream>
#include <math.h>

#include "galapix/viewer.hpp"
#include "galapix/workspace.hpp"

RotateTool::RotateTool(Viewer* viewer_)
  : Tool(viewer_),
    rotate_active(false),
    selection_center(),
    start_angle(0.0f)
{
}

void
RotateTool::move(const Vector2i& pos, const Vector2i& /*rel*/)
{
  if (rotate_active)
  {
    Vector2f mouse_pos = viewer->get_state().screen2world(pos);
    float angle = atan2f(selection_center.y - mouse_pos.y,
                         selection_center.x - mouse_pos.x);  

    std::cout << "Angle: " << ((start_angle - angle)/M_PI*180.0f) << std::endl;

    SelectionPtr selection = viewer->get_workspace()->get_selection();
    for(Selection::iterator i = selection->begin(); i != selection->end(); ++i)
    {
      (*i)->set_angle(start_angle - angle);
    }
  }
}

void
RotateTool::up  (const Vector2i& /*pos*/)
{
  rotate_active = false;
}

void
RotateTool::down(const Vector2i& pos)
{
  Vector2f mouse_pos = viewer->get_state().screen2world(pos);

  rotate_active    = true;
  selection_center = viewer->get_workspace()->get_selection()->get_center();
  
  start_angle = atan2f(selection_center.y - mouse_pos.y,
                       selection_center.x - mouse_pos.x);
}

/* EOF */
